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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Cycle that lasts weeks (ovulation->hormone cycles->ovulation)






2. Small tubes located at the upper ends of the uterine horns. connects uterine horn to infundibulum. passageway of the egg.






3. (LH) causes female's egg to break (her period)






4. 114 days






5. Allows extension of penis without fibro-elastic penis






6. Why does estrus happen before ovulation?






7. (from Jersey Islands in Great Britain) Smallest cow - least milk - highest butterfat %






8. (FSH) causes egg to mature in females






9. Produce testosterone. located between the seminiferous tubules






10. Why does estrus happen before ovulation?






11. 1. visual evaluation - 2. scrotal circumference - 3. penis and prepuce observation - 4. rectal palpation - 5. libido test - 6. semen evaluation






12. Cleans and lubricates the urethra. secretion is thick - viscous - and very slippery.

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13. 24 hours before end of estrus cycle






14. Cleans and lubricates the urethra. secretion is thick - viscous - and very slippery.

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15. 1. need to be restricted in amt of grain - 2. no more than 70% of ration can be concentrates. 3. *Acidic acid has to be produced in order for milk synthesis to occur (30% forages)






16. Indicator of sperm production. the bigger the scrotal circumference the bigger volume of sperm because more seminal vesicles available to produce the sperm






17. When are steers and heifers weaned from bottle feeding?






18. Front feet and head first. (except for hogs and dogs)






19. Check feet and legs - look for masculine traits in build such as crest and muscling






20. Castration tool which clamps down on the vans deferens. causes the sperm to not reach the penis to be ejaculated






21. Completes uterine growth initiated by estrogen and prepares the uterus for nourishment of developing embryo if pregnancy occurs - supports pregnancy by maintaining quiescent state of reproductive tract and suppresses mating behavior - prevents ovulat






22. Supply nutrients for the sperm following ejaculation and deposition into the female reproductive tract






23. Prevent the cow from getting an infection from the calve






24. ~305 days (altough often longer due to breeding difficulties)






25. 19-23 (21) days






26. Failure to have one testis (gonad) to descend






27. Implies the amount of estrogen production






28. (LH) stimulates the Leydig cells to produce testosterone






29. 1-2 days






30. 45-60 days after breeding; re-breed as required






31. 283 days






32. Not under a timeline - cow can not be sold as steak






33. % of fat in milk. makes cheeses and ice cream. regulates cost of milk






34. 1. visual evaluation - 2. scrotal circumference - 3. penis and prepuce observation - 4. rectal palpation - 5. libido test - 6. semen evaluation






35. Sperm is produced here






36. (male) pushes the testes upward toward the body for warmth or protection






37. 336 days






38. Look for infection - split - and rupture of the penis






39. Knife-loose ~1wk of growth. band-loose ~2wks of growth.






40. Small tubes located at the upper ends of the uterine horns. connects uterine horn to infundibulum. passageway of the egg.






41. Gonadotropic (GnRH) is (FSH and LH). Follical Stimulating (FSH) and Lutinizing Hormone (LH).






42. 1-3 days






43. 30 hours after estrus begins






44. BST given to dairy cattle makes the mammary gland more persistent - helps produce more milk. good as Long-term because it does not cause cow to bulk up - provides more milk/cow Which means less cows needed - less cows need to be given feed - lower co






45. Hold the penis in the bulls body when not in use. releases penis before ejaculation or urination.






46. Cleans and lubricates the urethra ahead of the sperm. (if not - the urine in the urethra has a high salt content and would cause sperm to rupture and die)






47. What makes the milk flow through the mammary glands?






48. Animals which have many estrous periods during certain periods per year (ex: mare - ewe)






49. 336 days






50. 1. need to be restricted in amt of grain - 2. no more than 70% of ration can be concentrates. 3. *Acidic acid has to be produced in order for milk synthesis to occur (30% forages)







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